US3889715A - Arrangement in a pipe for enclosing insulation - Google Patents

Arrangement in a pipe for enclosing insulation Download PDF

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Publication number
US3889715A
US3889715A US373687A US37368773A US3889715A US 3889715 A US3889715 A US 3889715A US 373687 A US373687 A US 373687A US 37368773 A US37368773 A US 37368773A US 3889715 A US3889715 A US 3889715A
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United States
Prior art keywords
pipe
jacket
edges
flanges
recited
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Expired - Lifetime
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US373687A
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English (en)
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Lars Harry Lilja
Charles Folke Sigvard Ottoson
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeves; consisting of two half sleeves; comprising more than two segments
    • F16L59/025—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeves; consisting of two half sleeves; comprising more than two segments comprising more than two segments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/10—Bandages or covers for the protection of the insulation, e.g. against the influence of the environment or against mechanical damage

Definitions

  • ABSTRACT The invention concerns an arrangement in pipes for enclosing pipe insulation, which arrangement consists of a cylindrical jacket being concentric with the pipe, and of flanges projecting substantially radially from the surface of the jacket facing the pipe, the flanges being connected to the pipe or resting against the same.
  • the arrangement is characterized in that it comprises a plurality of elements, each element consisting of an outer portion which is constructed as a part of the cylindrical jacket having a straight or substantially arcuate cross section and of one of the flanges being connected to or abutting the pipe, the longitudina' edges of each outer portion overlapping with, lying against or being detachably connected to the edge of the adjacent outer portion.
  • the present invention relates to an arrangement in pipes for enclosing pipe insulation comprising a cylindrical jacket concentric with the pipe and flanges extending essentially radially from the surface of the jacket facing the pipe, said flanges being connected to the pipe or lying against it.
  • a previously known arrangement for enclosing insulation around pipes comprises a protective tubing or jacket which with various intermediate layers is disposed essentially concentrically around the pipe which is to be insulated. The insulation is then done by filling with or injecting an appropriate insulation material from one end of the pipe.
  • the length of the pipe is limited for practical reasons.
  • this arrangement is only useable for straight pipe since each bending would jeopardize the concentricity of the outer and inner tubes, thereby producing a heat bridge with leakage losses as a result.
  • insulating pipe is also previously known by strip insulation material being wound onto the pipe, by tubular pipe halves of insulating material being applied from the outside onto the pipe and fastened to the same by casting and filling of insulation material around the pipe.
  • the purpose of the present invention is to eliminate the above-mentioned disadvantages in insulated pipe.
  • Another primary aim is to make possible the productron of insulated pipe of unlimited length. Additional purposes are to give the pipe a homogeneous insulation, peripherally as well as longitudinally, and to make possible a quick and simple insulation of pipe at the same time as it is laid out.
  • each outer portion constructed as a part of the cylindrical jacket having a straight or essentially arc-shaped cross section and of one of the flanges connected to or lying against the pipe.
  • the longitudinal edges of each outer portion overlap with and lie against or are detachably connected to the edge of the adjacent outer portion.
  • FIGS. 1-5 show an end view of an embodiment of a pipe provided with an arrangement according to the invention for enclosing pipe insulation.
  • pipe 1 which is to be insulated, is constructed as one piece with a number of radial flanges 2 which at their outer edges pass directly into outer portions 3 with a cross section which coincides with a part of a cylindrical jacket.
  • Each of these outer portions 3 extends essentially the same distance from the flange 2 on both sides of said flange and has such an arc length that the outer edges overlap the outer edges of the adjacent outer portions 3' and 3".
  • flange 2 and outer portion 3 that the pipe 1 is surrounded by a jacket which is formed of the outer portions 3, 3', 3" etc. which are shaped as parts of the cylindrical jacket.
  • each portion 3 is preferably provided with a simple pocket 4 so that the jacket has a flat outer surface even within the area of overlap.
  • a space 5 is formed with a cross section in the shape of a ring section. This space is designed to be filled with pipe insulation, e.g. foam rubbet.
  • the pipe 1 with its flanges 2 and outer portions 3 can be extruded from a material which is suitable for the fluid passing through the pipe 1.
  • This material should have sufficient elasticity however, so that the outer portions 3, 3', 3" etc. constructed as parts of the cylindrical jacket can be pressed radially outwards and inwards by means of an extrusion nozzle for plastic material when insulation is to be inserted in the spaces 5.
  • this nozzle can be moved in the longitudinal direction of the pipe 1, the overlap seam opening in front of the nozzle and closing again after it.
  • FIG. 2 shows a second embodiment of the invention which in principle agrees completely with the embodiment according to FIG. 1 with the exception that the pipe 21 is not circular.
  • the expression cylindrical jacket. which is used in the present description and accompanying claims, is not restricted to refer to a circular cylindrical jacket.
  • FIG. 2 also shows that the extending flanges can be constructed on some of the outer portions, e.g. 3", which form the surrounding jacket. These outer flanges serve as spacers between the insulated pipe and a support.
  • each flange 20 is shaped like a fork 7 along its inner edge.
  • the tines of the fork are bent towards each other.
  • the pipe 31 is provided with longitudinal radial fins 8 in a number which corresponds to the number of elements 20,30. On their outer edges these fins are provided with an essentially circular bead 9.
  • the elements consisting of outer portion 30 and flange 20 can be mounted on the pipe 31 by forcing the tines of the fork by radial pressure to snap over the beads 9 of the fins 8.
  • FIG. 4 shows another embodiment of the invention which only differs from the embodiment according to FIG. 1 in that the outer portion 32 constructed as a part of the cylindrical jacket is not single-grooved along one longitudinal edge. Instead the edge is constructed as a fork 10 which surrounds the edge of the adjacent outer portion 32.
  • the embodiment according to FIG. 4 can of course comprise snap connections according to FIG. 3, if desired.
  • FIG. 5 shows asomewhat different embodiment which can be used in pipes of different diameters.
  • arrangement for enclosing insulation in this case also comprises a number of units, each of which consists of an outer portion 33 constructed as a part of a cylindrical jacket, and an essentially radially extending flange 22.
  • One longitudinal edge of the outer portion 33 is constructed as a fork 11 with a relatively large depth.
  • the inside of at least one of the fork tines, preferably the outer, is provided with longitudinal ridges or teeth 12.
  • the opposite longitudinal edge of the outer portion is likewise provided with longitudinal ridges or teeth 14 on one or both of its sides.
  • the flange 22 is somewhat bent away from the radial direction, at least within its outer rim portion.
  • the convex surface of the bent flange 22 will come into contact with the outer surface of the pipe 41 and is bent towards the outer portion 33.
  • the elements 22,33 can thereby be used in pipes 41, 41' with different diameters as according to FIG. 5.
  • the thickness of the insulation is varied by the elements 22,33 being pressed more or less strongly against the pipe 41. These variations are taken up by a greater or lesser bending of the flanges 22 and by the edges with teeth of the outer portions 33 being pressed a shorter or longer distance into the cooperating fork 11.
  • the elements made up of outer portion and flange, possibly only the flanges, can be so constructed that they extend spirally around the pipe. The flexibility of the pipe is improved thereby.
  • Appropriate materials for the production of an arrangement for enclosing insulation and possibly a pipe to be used in said arrangement are extrudable plastics or metals such as polyethylene and aluminum, respectively.
  • an insulated pipe according to the invention has the following advantages.
  • the inner pipe is securely centered in the outer jacket since the flanges between them assure a constant separation.
  • the pipe can be laid with curves, especially when the elements consisting of outer portion and flange extend spirally around the pipe.
  • the inner pipe, flanges and surrounding jacket can be optionally produced from the same material or of two different materials.
  • Means for enclosing an insulation around a pipe comprising a. a jacket spaced from said pipe in a substantially concentric manner to define an annular space around said pipe, said jacket being divided along a plurality of longitudinally extending lines at spaced circumferential positions thereabout so as to form a plurality of jacket portions, the edges along the line of division of each pair of adjacent jacket portions maintained in overlapping and resilient abutting relationship with each other, the overlapping relationship maintained by the resiliency of the abutting jacket portions;
  • each flange having an outer edge connected to the inner surface of the cooperating jacket portion between the edges thereof and extending in a substantially radial direction therefrom, each flange furthermore having an inner edge connected to the outer surface of said pipe, said flanges dividing the annular space into a plurality of longitudinally extending compartments, one between each pair of adjacent flanges;
  • each pair of adjacent jacket portions being resiliently separable by the pressure exerted by a means inserted therebetween for introducing insulation into said compartments.
  • said pipe includes a number of longitudinally extending and circumferentially spaced fins protruding therefrom in a substantially radial direction with cooperative means on the inner edge of each of said flanges and said fins for forming a snap-lock engagement between said fins and said flanges.
  • Means for enclosing an insulation around a pipe comprising a. a jacket spaced from said pipe in a substantially concentric manner to define an annular space around said pipe, said jacket being divided along a plurality of longitudinally extending lines at spaced circumferential positions thereabout so as to form a plurality of jacket portions, the edges along the line of division of each pair of adjacent jacket portions maintained in overlapping and resilient abut ting relationship with each other, the overlapping relationship maintained by the resiliency of the abutting jacket portions;
  • each flange having an outer edge connected to the inner surface of the cooperating jacket portion between the edges thereof and extending in a substantially radial direction therefrom, each flange furthermore having an inner edge connected to the outer surface of said pipe, said flanges dividing the annular space into a plurality of longitudinally extending compartments, one between each pair of adjacent flanges;
  • each pair of adjacent jacket portions being resiliently separable by the pressure exerted by a means inserted therebetween for introducing insulation into said compartments.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)
US373687A 1972-01-10 1973-06-26 Arrangement in a pipe for enclosing insulation Expired - Lifetime US3889715A (en)

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SE00213/72A SE364099B (en(2012)) 1972-01-10 1972-01-10

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Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029344A (en) * 1976-09-23 1977-06-14 Wallace-Murray Corporation Connection joint for prefabricated metal chimney
US4462618A (en) * 1981-03-16 1984-07-31 Wallace-Murray Corporation Prefabricated double-walled metal chimney
US4519434A (en) * 1982-11-19 1985-05-28 Security Shutter Corporation Winding mechanism for rollable shutter curtain
WO1989004047A1 (en) * 1987-10-27 1989-05-05 Performance Contracting, Inc. Treadable insulation system with lagging support
US4929000A (en) * 1988-12-02 1990-05-29 American Metal Products Company Multiple walled chimney
US5437312A (en) * 1993-01-27 1995-08-01 Performance Contracting, Inc. Reinforced insulation blanket
US5468026A (en) * 1993-08-03 1995-11-21 American Metal Products Company Spacer clip for chimney
WO1998031961A1 (en) * 1997-01-21 1998-07-23 Majnaric Technologies, Inc. Concrete pipes and methods for the manufacture thereof
US5791379A (en) * 1997-05-23 1998-08-11 Piorkowski; Michael J. Pipe cage
US6113059A (en) * 1997-10-10 2000-09-05 Engineered Metals Corporation Dead shaft idler
US6564831B1 (en) * 1999-03-23 2003-05-20 Gaimont Universal Ltd. B.V.I. Entruded multitubular device
US6595241B2 (en) 2001-06-10 2003-07-22 Yaron Chen Prefabricated elements for thermal maintenance of industrial pipe
AU770218B2 (en) * 1998-07-15 2004-02-19 Michael J. Piorkowski Pipe cage
US20080223471A1 (en) * 2007-03-13 2008-09-18 Wen-Li Guo Hose with multiple passages
US20120037151A1 (en) * 2009-04-27 2012-02-16 Mcentee Paul Thomas Solar collector
US20120181413A1 (en) * 2011-01-18 2012-07-19 Armacell Enterprise Gmbh Mounting system for insulated installations
US20120211117A1 (en) * 2010-10-20 2012-08-23 Sproule Iii Charles G Water resistant adjustable jackets for insulated pipe and pipe bends
US20120273169A1 (en) * 2010-01-27 2012-11-01 Fu Liming Pipe having variable cross section
US20140090736A1 (en) * 2012-09-28 2014-04-03 Bp Corporation North America Inc. Burn protection systems and standoffs for piping
EP2507883A4 (en) * 2009-12-02 2014-04-16 3M Innovative Properties Co ELECTRIC WIRE SEPARATOR SUITABLE FOR USE IN A CABLE SPLICE PROTECTION ENVELOPE
US20140182733A1 (en) * 2012-12-28 2014-07-03 Gyre Innovations Lp Extruded multiwall tubular structure
US9039044B1 (en) * 2014-02-13 2015-05-26 James E. Baldwin Standoff ring and safety cage for process pipe
US20170023169A1 (en) * 2014-03-28 2017-01-26 Public Joint Stock Company "Transneft" Method of thermally insulating stop valves, and thermal-insulation device
US20180252475A1 (en) * 2015-08-25 2018-09-06 Danfoss Micro Channel Heat Exchanger (Jiaxing) Co., Ltd. Heat exchange tube for heat exchanger, heat exchanger and assembly method thereof
US20210231377A1 (en) * 2019-03-29 2021-07-29 Hamilton Sundstrand Corporation Fuel heat exchanger with a barrier
US11231140B1 (en) * 2020-03-24 2022-01-25 Warren Andrews Multi-layered conduit

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1110008A (en) * 1911-10-24 1914-09-08 William R Ripley Stave porch-column.
US2810233A (en) * 1953-05-05 1957-10-22 Jakobsen Gert Bastian Toy building elements
US2937662A (en) * 1956-06-25 1960-05-24 Marion C Green Multiple insulated pipe system
US3007208A (en) * 1959-03-31 1961-11-07 B B Chem Co Methods of applying resin foam
US3144881A (en) * 1961-08-18 1964-08-18 Joy Mfg Co Construction element
US3528456A (en) * 1968-01-09 1970-09-15 Kabel Metallwerke Ghh Coaxial tubular members spaced with insulating spacer means
US3559660A (en) * 1968-08-28 1971-02-02 Warren Petroleum Corp Pipe insulation and method of making same
US3563825A (en) * 1965-01-26 1971-02-16 Exxon Research Engineering Co Method for insulating pipelines wherein more insulating material is above the center line of the pipe than below the center line
US3636985A (en) * 1970-03-16 1972-01-25 Keith L Burchett Tubular steel sheeting

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1110008A (en) * 1911-10-24 1914-09-08 William R Ripley Stave porch-column.
US2810233A (en) * 1953-05-05 1957-10-22 Jakobsen Gert Bastian Toy building elements
US2937662A (en) * 1956-06-25 1960-05-24 Marion C Green Multiple insulated pipe system
US3007208A (en) * 1959-03-31 1961-11-07 B B Chem Co Methods of applying resin foam
US3144881A (en) * 1961-08-18 1964-08-18 Joy Mfg Co Construction element
US3563825A (en) * 1965-01-26 1971-02-16 Exxon Research Engineering Co Method for insulating pipelines wherein more insulating material is above the center line of the pipe than below the center line
US3528456A (en) * 1968-01-09 1970-09-15 Kabel Metallwerke Ghh Coaxial tubular members spaced with insulating spacer means
US3559660A (en) * 1968-08-28 1971-02-02 Warren Petroleum Corp Pipe insulation and method of making same
US3636985A (en) * 1970-03-16 1972-01-25 Keith L Burchett Tubular steel sheeting

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029344A (en) * 1976-09-23 1977-06-14 Wallace-Murray Corporation Connection joint for prefabricated metal chimney
US4462618A (en) * 1981-03-16 1984-07-31 Wallace-Murray Corporation Prefabricated double-walled metal chimney
US4519434A (en) * 1982-11-19 1985-05-28 Security Shutter Corporation Winding mechanism for rollable shutter curtain
WO1989004047A1 (en) * 1987-10-27 1989-05-05 Performance Contracting, Inc. Treadable insulation system with lagging support
US4925622A (en) * 1987-10-27 1990-05-15 Performance Contracting, Inc. Treadable insulation system with lagging support
US4929000A (en) * 1988-12-02 1990-05-29 American Metal Products Company Multiple walled chimney
US5437312A (en) * 1993-01-27 1995-08-01 Performance Contracting, Inc. Reinforced insulation blanket
US5468026A (en) * 1993-08-03 1995-11-21 American Metal Products Company Spacer clip for chimney
US5927346A (en) * 1997-01-21 1999-07-27 Majnaric Technologies, Inc. Concrete pipes and methods for the manufacture thereof
WO1998031961A1 (en) * 1997-01-21 1998-07-23 Majnaric Technologies, Inc. Concrete pipes and methods for the manufacture thereof
US5791379A (en) * 1997-05-23 1998-08-11 Piorkowski; Michael J. Pipe cage
WO2000004319A1 (en) * 1997-05-23 2000-01-27 Piorkowski Michael J Pipe cage
US6113059A (en) * 1997-10-10 2000-09-05 Engineered Metals Corporation Dead shaft idler
AU770218B2 (en) * 1998-07-15 2004-02-19 Michael J. Piorkowski Pipe cage
US6564831B1 (en) * 1999-03-23 2003-05-20 Gaimont Universal Ltd. B.V.I. Entruded multitubular device
US6595241B2 (en) 2001-06-10 2003-07-22 Yaron Chen Prefabricated elements for thermal maintenance of industrial pipe
US20080223471A1 (en) * 2007-03-13 2008-09-18 Wen-Li Guo Hose with multiple passages
US20120037151A1 (en) * 2009-04-27 2012-02-16 Mcentee Paul Thomas Solar collector
EP2507883A4 (en) * 2009-12-02 2014-04-16 3M Innovative Properties Co ELECTRIC WIRE SEPARATOR SUITABLE FOR USE IN A CABLE SPLICE PROTECTION ENVELOPE
US20120273169A1 (en) * 2010-01-27 2012-11-01 Fu Liming Pipe having variable cross section
US9004113B2 (en) * 2010-01-27 2015-04-14 Liming FU Pipe having variable cross section
US8783301B2 (en) * 2010-10-20 2014-07-22 Charles G. Sproule, III Water resistant adjustable jackets for insulated pipe and pipe bends
US20120211117A1 (en) * 2010-10-20 2012-08-23 Sproule Iii Charles G Water resistant adjustable jackets for insulated pipe and pipe bends
US20120181413A1 (en) * 2011-01-18 2012-07-19 Armacell Enterprise Gmbh Mounting system for insulated installations
US9574702B2 (en) * 2011-01-18 2017-02-21 Armacell Enterprise Gmbh & Co. Kg Mounting system for insulated installations
US20140090736A1 (en) * 2012-09-28 2014-04-03 Bp Corporation North America Inc. Burn protection systems and standoffs for piping
US20140182733A1 (en) * 2012-12-28 2014-07-03 Gyre Innovations Lp Extruded multiwall tubular structure
US9052039B2 (en) * 2012-12-28 2015-06-09 Gyre Innovations Lp Extruded multiwall tubular structure
US9039044B1 (en) * 2014-02-13 2015-05-26 James E. Baldwin Standoff ring and safety cage for process pipe
US20170023169A1 (en) * 2014-03-28 2017-01-26 Public Joint Stock Company "Transneft" Method of thermally insulating stop valves, and thermal-insulation device
US10648610B2 (en) * 2014-03-28 2020-05-12 Public Joint Stock Company “Transneft” Method of thermally insulating stop valves, and thermal-insulation device
US20180252475A1 (en) * 2015-08-25 2018-09-06 Danfoss Micro Channel Heat Exchanger (Jiaxing) Co., Ltd. Heat exchange tube for heat exchanger, heat exchanger and assembly method thereof
US10690420B2 (en) * 2015-08-25 2020-06-23 Danfoss Micro Channel Heat Exchanger (Jiaxing) Co., Ltd. Heat exchange tube for heat exchanger, heat exchanger and assembly method thereof
US20210231377A1 (en) * 2019-03-29 2021-07-29 Hamilton Sundstrand Corporation Fuel heat exchanger with a barrier
US11713929B2 (en) * 2019-03-29 2023-08-01 Hamilton Sundstrand Corporation Fuel heat exchanger with a barrier
US11231140B1 (en) * 2020-03-24 2022-01-25 Warren Andrews Multi-layered conduit

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